The sum of neutrons and protons defines the mass number of an isotope.
Answer: Option A
<u>Explanation:</u>
Isotopes of an element are defined as an element that possess the same number of protons but different number of neutrons in each atom. Hence the mass number in an isotope depends upon the two sub particles which are number of nucleons (i.e) the number of protons and neutrons. For example: carbon - 12 and carbon - 13 are examples of isotopes, the carbon element with mass number as 12 and 13.
The maximum upward acceleration that the elevator can have without breaking is = 10.36m/s².
<h3>How to calculate maximum upward acceleration?</h3>
To calculate the maximum acceleration of the elevator we must take into account Newton's second law and its formula that takes into account the following aspects:
- F = Is the force applied in newtons.
- m = Is the mass of the object in kilograms.
- a = Is the acceleration of the object in meters per second squeared.
According to the above, we apply the values we have as follows:
- a =

- a =

Note: This question is incomplete because some information is missing. Here is the complete information.
Learn more about acceleration in: brainly.com/question/13312735
B. The location of an object.
The term position describes the location of a place with respect to some reference point called origin.
Answer:Transformer
Explanation:All the other devices generate their own electricity apart from power line and Transformer, power line just carries electricity. A transformer can be used to step up or step down voltages from a source.
Explanation:
Crust...molten
a. Oceanic, iron
b. Continental, silicates
c. less
3. Mantle, Denser
a. Lithosphere
b. Asthenosphere
4. Core
a. elements, rocks
b. liquid, magnetic
(I guess the liquid should come after the is)
Couldn't answer all but wanted to help